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Subject:induction noise or vacuum leak?
From:Scott Terry
Date:Sat, 10 Mar 2001 12:52:21 -0800

Hi!

I'm a new owner of an '85 Westy, my first VW.

Listening to the engine with the engine cover off, I think I hear a vacuum
leak in the area of the intake manifold on top of the engine.
However, being unfamliar with these engines, I wonder if I'm just hearing
air induction noise.

Through examination, I have ruled out vacuum leaks in all the vacuum hoses,
the air cleaner/AFM, and the rubber elbow between the AFM and throttle body
valve.

I have sprayed the engine (during idle) with starter fluid, especially
around the vacuum connections and intake manifold, and observed no surging
in engine speed. (I wouldn't recommend anyone try this; you could cause
dammage to the cat. converter, an engine fire, etc.)

QUESTION: When listening to YOUR (hopefully leak-free) engine, do you hear a
noticeable amount of induction noise coming from the intake manifold at
idle?  Or do you think I need to keep hunting for a leak?

Please send an e-mail directly to my home address (sgt000@hotmail.com)
since I am at home and unable to check the address to which the list
messages are delivered.  I'll post a summary of responses/solution to the
list at a later date.

Thanks,
Scott
'85 Westy "Pearl"
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